L. S. Grechushnikova

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1. A reliable increase in the amplitude of the evoked potential of the midbrain reticular formation to flashes of light was brought about during the formation of a dominant focus in the RF by multiple stimulation of the RF with an electrical current. 2. The existence of a dominant focus in a latent form was confirmed by the reliable increase in the(More)
In the sensorimotor cortex of awake rabbits monosynaptic afferent and efferent connections of callosal neurons (CN) with ipsilateral specific thalamic nuclei (ventral posterolateral, ventral posteromedial, ventral lateral and anteroventral nuclei) were analyzed by electrophysiological method and compared with those of target-units of callosal fibres (TU).(More)
A comparative analysis of monosynaptic afferent and efferent connections of callosal neurons and target neurons of transcallosal fibers with neurons of the specific ipsilateral thalamic nuclei (ventral posterolateral, ventral posteromedial, ventral lateral, and anteroventral) was undertaken on the sensomotor cortex of unanesthetized rabbits, using an(More)
Criteria of identification of transcallosal monosynaptic responses recorded extracellularily in the sensorimotor cortex to stimulation of the homotopic area of the contralateral hemisphere were studied in unanaesthetized, non-immobilized rabbits. It was found that major criteria by which a monosynaptic response differs from an antidromic one, are: absence(More)
During creation of a dominant focus in the midbrain reticular formation (RF) by its multiple stimulation with a high-frequency current (stimulation frequency 200 Hz, pulse duration 0.1-0.5 ms, voltage 1-3 V, duration 5 s) a statistically significant increase of the amplitude of the evoked potential (EP) in RF to light flashes was revealed in comparison with(More)
Antidromic responses of two callosal neurones to a local electrical stimulation of the rabbit sensorimotor cortex may be recorded simultaneously with one microelectrode in the homotopic cortical area. In such recording conditions the relative amplitude of extracellularly recorded action potentials of the two neurones is determined primarily by the distance(More)
In chronic experiments on rabbits it was shown that after two-three stimulations of the midbrain reticular formation (stimulation frequency 200 cps, pulse duration 0.1-0.5 ms, voltage 1-3 V, stimulation duration 5 s) a dominant focus was formed in it, which led simultaneously to a statistically significant increase in the amplitude of evoked potential in(More)
1. A dominant state formed in the mesencephalic reticular formation during high-frequency electrical stimulation of that structure had an influence on the functional state of the sensomotor cortex. This was manifested as a simultaneous statistically significant increase in amplitude of the evoked cortical potentials and in the number of motor responses to(More)
1. As a result of low-frequency subconvulsive electrical stimulation of the sensomotor cortex of an unanesthetized, uncurarized rabbit, groups of AP spreading antidromically along the axons to the soma of callosal neurons located in the opposite hemisphere arose spontaneously after single stimulation. 2. Groups of spontaneous antidromic AP were recorded in(More)